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H. P. CALDWELL. v MECHANISM FOR VBNTILATING RAILWAY PASSENGER CARS- No. 575,823. Patented Jan. 26. 1897.

I VE- LU WILHEEEES.

NITED STATES HERBERT F. OALDYVELL, OF IRVINE, PENNSYLVANIA, ASSIGNOR OF ONE- I HALF TO HYATT ENEED, OF SAME PLACE.

MECHANISM FOR VENTILATING RAILWAY PASSENGER-CARS.

SPECIFICATION forming part of Letters Patent No. 575,823, dated January 26, 1897.

Application filed June 8, 1896. Serial No. 594,757. (lilo model.)

tilating Railway Passenger-(Jars; and I do.

hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same,

reference being had to the accompanying drawings, and to the letters of reference marked thereon, forming part of this specification.

My invention relates to the improvements in mechanism for ventilating railway passenger-cars, hereinafter set forth and described; and it consists, substantially, of one or more rotary fans in the upper part of the car driven by intermediate mechanism communicating with one of the truck-axles supporting the car.

The accompanying drawings illustrate my invention, in which- Figure 1 shows a longitudinal vertical section of one-half of a railway passenger-car embodying my invention. Fig. 2 shows a transverse vertical section of the same.

In the drawings, A is the car-body, and B the truck, both of ordinaryconstruction. On one of the truck-axles b I secure a sprocket- 7 wheel O, and in suitable bearings D on the under side of the car-body is mounted a transverse shaft D, upon which is secured, by means of a spline and groove (Z, a sprocketwheel E, from which a sprocket-chain E extends to the sprocket-wheel C, so that the shaft D is driven thereby. On the shaft D are also mounted loose collars at each side of the sprocket-wheel E, to which spring-arms e are secured, in the outer ends of which are tightener pulleys 6, bearing upon the sprocketchain E, so that the slack of the chain caused by the relative movements of the carbody and truck is taken up. On the shaft D are also secured two bevel friction-pulleys F F, facing toward each other, and mounted in bearings in the end of the car-closet is a vertical shaft G, upon the lower end of which is secured a bevel-pulley f. 011 the shaft D is also secured a grooved collar H, in which a ring H operates, this ring being connected by means of links it with one end of a bellcrank lever I, mounted in bearings on the bottom of the car-body, a rod 1 connecting with the other end of the bell-crank lever I and extending up into the car-closet, where it connects with crank-and-handle mechanism t", by means whereof the shaft D can be moved longitudinally, so as to bring the friction-pulleys F or E into contact with the friction-pulley f, so as to change the direction of the rotation of the shaft G according to the direction the car is traveling. On the upper end of the vertical shaft G is another bevel friction-pulley g, and in the upper part of the closet is mounted a longitudinal shaft J, provided with a bevel friction-pulley K, one end thereof adapted to contactwith and be driven by the bevel friction-pulley g. On this shaft J is also a grooved belt-pulley k, as and for the purpose hereinafter set forth. The bearing L of the shaft J, next to the friction-pulley K, is mounted upon a piston-rod Z, which extends into a cylinder M, provided with a piston Z, (shown in dotted lines,) and to the lower part of said cylinder a pipe N is connected, communicating with the air-brake pipes of the car, through which air is furnished to said cylinder at sufficient pressure to raise the piston Z in said cylinder and the shaft-bearin g L, communicating therewith, so as to keep the friction-pulley K in contact with the friction-pulley g, so that the shaft J will be driven thereby. On the cylinder M there is also a valve m, operated by an ordinary speed-governor 0, so as to open the valve and allow a portion of the air under the piston Z to escape when the shaft J is being rotated too rapidly, thereby governing the speed of the shaft J. From the pulley k a belt It extends up to a pulley 19 on a longitudinal shaft P in the upper part of the car and communicates the motion of the shaft J thereto.

On the shaft P, I place pulleys p, from which belts extend to and drive fans R in the upper part of the car, any number of said fans desired being driven by the longitudinal shaft P.

In operation the rotation of the truck-axle I) through the sprocket-chain E drives the shaft D, which, through the bevel frictionpnlleys F F, drives the vertical shaft G, the direction of the rotation of the shaft G being controlled by the hand-lever '1", so as to bring the pulley F or F into contact with the pulley f as desired. The bevel friction-pulley g communicates motion through the bevel friction-puleys g and K to the shaft J, and the belt 70 communicates the motion of the shaft J to the shaft P and thence to the fans R.

Having thus described my invention, so as to enable others to construct and operate the same, what I claim as new, and desire to secure by Letters Patent of the United States, 1s-

1. In a mechanism for ventilating railway passenger-cars, a vertical shaft, a bevel friction-pulley on the upper end of said shaft, a horizontal shaft, a bevel friction-pulley on said shaft adapted to engage and be driven by the friction-pulley on the vertical shaft, a bearing for said horizontal shaft ad jaeent to the friction-pulley thereon, apiston operating in a cylinder for supporting said bearing, a pipe communicating with the air-brake pipe supplying air to said cylinder under said piston, an escape-valve on said cylinder, and a rotating governor for operating said valve, substantially as and for the purpose set forth.

2. The combination in a mechanism for ventilating railway passenger-cars, of a sprocketwheel 0 on one of the truck-axles, a sprocketchain E running to and driving a sprocket- Wheel E on a transverse shaft D 011 the carbody, a spring-acti'iated tightener e 011 said sprocket-chain, bevel friction-pulleys F F 011 said shaft, a vertical shaft G having a bevel friction-pulley f thereon adapted to be alternately actuated by the pulleys F F, means for moving the shaft D longitudinally in its bearings, a bevel friction-pulley g on the upper end of the shaft G, a horizontal shaft J, a bevel-pulley on the end of said shaft adapted to engage and be actuated by the frictionpulley g, a bearing L for said shaft J adjacent to the friction-pulley K thereon, air-actuated piston mechanism supporting said bearing, escape-valve mechanism m on said air-cylinder, and governor mechanism 0 for actuating said valve, a driving-belt pulley k on said shaft J, a fan-driving shaft P, belt connection 70' between the shaft J and the shaft P, ventilating-fans R in the upper part of the car, and driving-belt mechanism connecting said fans with the fan-driving shaft 1, substantially as and for the purpose set forth.

The combination, with two drivingshafts, in tergearing friction-wheels secured on the said shafts, and a fan operated by the said parts; of a stationary air-cylinder provided with a piston and a piston-rod, a bearing for one of the said shafts carried by the said rod, and a con1pressed-ainsupply pipe connected to the said cylinder, whereby the said wheels are pressed into driving contact, substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

HERBERT F. CALDWELL.

lVitnesses:

C. B. HAYES, H. OPPENHEIMER. 

